Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752520Ab2BTAO3 (ORCPT ); Sun, 19 Feb 2012 19:14:29 -0500 Received: from terminus.zytor.com ([198.137.202.10]:57223 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751567Ab2BTAO1 (ORCPT ); Sun, 19 Feb 2012 19:14:27 -0500 From: "H. Peter Anvin" To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Cc: mingo@kernel.org, tglx@linutronix.de, hpa@zytor.com, torvalds@linux-foundation.org, akpm@linux-foundation.org, hjl.tools@gmail.com Subject: [PATCH 12/30] compat: Create compat_sys_p{read,write}v64 Date: Sun, 19 Feb 2012 16:07:50 -0800 Message-Id: <1329696488-16970-13-git-send-email-hpa@zytor.com> X-Mailer: git-send-email 1.7.6.5 In-Reply-To: <1329696488-16970-1-git-send-email-hpa@zytor.com> References: <1329696488-16970-1-git-send-email-hpa@zytor.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.6 (terminus.zytor.com [127.0.0.1]); Sun, 19 Feb 2012 16:14:22 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2757 Lines: 80 From: "H. J. Lu" For 32-bit ABIs which have real 64-bit registers, we don't want to break the position argument into two. However, we still need compat support to deal with 32-bit pointers, so we can't just use sys_p{read,write} directly. Signed-off-by: H. Peter Anvin --- fs/compat.c | 26 ++++++++++++++++++++------ 1 files changed, 20 insertions(+), 6 deletions(-) diff --git a/fs/compat.c b/fs/compat.c index fa9d721..83d751c 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -1177,10 +1177,9 @@ compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, } asmlinkage ssize_t -compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, - unsigned long vlen, u32 pos_low, u32 pos_high) +compat_sys_preadv64(unsigned long fd, const struct compat_iovec __user *vec, + unsigned long vlen, loff_t pos) { - loff_t pos = ((loff_t)pos_high << 32) | pos_low; struct file *file; int fput_needed; ssize_t ret; @@ -1197,6 +1196,14 @@ compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, return ret; } +asmlinkage ssize_t +compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec, + unsigned long vlen, u32 pos_low, u32 pos_high) +{ + loff_t pos = ((loff_t)pos_high << 32) | pos_low; + return compat_sys_preadv64(fd, vec, vlen, pos); +} + static size_t compat_writev(struct file *file, const struct compat_iovec __user *vec, unsigned long vlen, loff_t *pos) @@ -1236,10 +1243,9 @@ compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, } asmlinkage ssize_t -compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, - unsigned long vlen, u32 pos_low, u32 pos_high) +compat_sys_pwritev64(unsigned long fd, const struct compat_iovec __user *vec, + unsigned long vlen, loff_t pos) { - loff_t pos = ((loff_t)pos_high << 32) | pos_low; struct file *file; int fput_needed; ssize_t ret; @@ -1256,6 +1262,14 @@ compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, return ret; } +asmlinkage ssize_t +compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec, + unsigned long vlen, u32 pos_low, u32 pos_high) +{ + loff_t pos = ((loff_t)pos_high << 32) | pos_low; + return compat_sys_pwritev64(fd, vec, vlen, pos); +} + asmlinkage long compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32, unsigned int nr_segs, unsigned int flags) -- 1.7.6.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/